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No. 6|9,927. Patented Feb; 2| I899.

- E. M. BENTLEY.

ELECTRIC RAILWAY TBULLEY.

(Application filed May 16, 1 898.) (Nu Model.) 2 Sheets-Sheet l.

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"- Patented Feb; 21,1399. v E. M. BENTLEY. ELECTRIC RAILWAY TROLLEY. (Ablimion filed m 16, 1896.) (No Model.) 2 Sheets-Sheet 2.

No. 6l9,927.

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UNITED STATES PATENT OFFICE;

EDWARD M. BENTLEY, OF NEW YORK, N. Y.

ELECTRIC-RAILWAY TROLLEY.

SPECIFICATION forming part of Letters Patent No. 619,927, dated February21, 1899 Application filed May 16, 1896. Serial No. 591,757. (No model.)

To all whom it may concern:

Be it known that I, EDWARD M. BENTLEY, a citizen of the United States,residing in the city, county, and State of New York, have, inventedcertain new and useful Improvements in Electric-Railway Trolleys, ofwhich the following is a specification, reference being made to theaccompanying drawings, in which Figure l is a side elevation, and Fig. 2is an end elevation, of the trolley which I have invented.

My invention consists of a trolley in which there is the usualcontact-wheel supported on the outer end of a long trailing arm carriedon the roof of the electrically-propelled car; but instead of theordinary vertical pivot around which the trailing arm is free to swing Iprovide a transverse track or guideway on which the trolley-base maytravel from side to side, so as to accommodate the contact-Wheel andtrailing arm to lateral inequalities of alinement in the trolley-wi rewith relation to the car-track.

In the accompanying drawings, A is a trolley-wheel journaled in theouter end of arm B and adapted in the usual manner to travel in contactwith the under side of a taut wire conductor when the arm is depressedin one direction or the other and its outer end forced upward under thetension of its spring.

The arm B is carried by a base 0, which has grooved rollers D running ona transverse track E, which is formed of a round rod with a supportingspline seated in chairs placed at intervals across the car-roof. By thisarrangement the trolley-arm and base cannot only roll sidewise alongtrack E, but can also revolve forward and backward about the track as acenter. Two coiled springs F are respectively attached at one end to twoprojections on the base 0 and at the other end to a hook oranchorage-piece G, traveling on track K parallel to track E. The twosprings are so adjusted that when the arm B is free of the conductor itwill tend to stand upright, but may be depressed in either directionagainst the force of one spring or the other, while the inactive springhas sufficient tension and the parts are of such dimensions that it willnot sag to such an extent as will bring it against the car-roof. Thetracks K K and E will be suitably braced apart, so as to withstand thetension of the springs. The trolley-arm and its base 0 will bemaintained in position on the upper surface of guide E by thedownwardly-acting force of springs F, and a weight or other tensiondevice may be substituted for springs F.

The two sets of springs F are only essential when the trolley is to bereversible, so as to trail in either direction. In whichever directionit trails the rear spring will be slack and exercise no active functionin the combination but when the trolley is reversed the spring which waspreviously slack becomes the active spring and the other one becomesinactive. lf the trolley is not to be reversed, but is intended to trailalways in one direction, the rear spring may be omitted and the frontspring will be so adjusted that when exerting no tension to press thetrolley-wheel against the conductor it will allow the trolleypole tostand slightly out of the vertical position, so as not to be in aposition of unstable equilibrium and liable to fall forward.

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination with an inclined trolley-arm and a contact device atits outer end, of a guide-bar attached to the car and extendingtransversely across it, a traveling connection between the lower end ofsaid trolley-arm and the guide-bar permitting the arm to swing bodily toand from the conductor and a spring acting to press the inclined arm andcontact device thereon upward against the conductor.

2. The combination with a trolley-arm and a contact device at its outerend, of a guidebar attached to the car and extending transversely acrossit, a traveling connection between the lower end of said trolley-arm andthe said guide, and a laterally-moving spring connectedat one end to thesaid trolley-arm so as to move therewith and at the other end to asimilarly-moving part of the structure.

3. The combination with the inclined trolley-arm B swinging in avertical plane to and from the conductor around a transverse axis,

a base for the said arm, rollers D, a transtransverse guide for theouter end of said [0 verse guide-bar attached to the car on whichspring. the rollers travel and means for holding the In Witness whereofI have hereunto set my trolley-arm and base in position on the upperhand this 5th day of May, 1896. side of the said guide-bar. T r 4. Thecombination with a pivoted trolley- EDWARD BENTLILS arm and a springpressing the outer end of l Witnesses: said arm upward, of a transverseguide on L. T. SHAW, which the said arm may travel and a similar E. L.SMITIL

